1. Department of Organic Chemistry, University of Debrecen, P.O. Box 400, 4002 Debrecen, Hungary
2. Doctoral School of Chemistry, University of Debrecen, Egyetem tér 1, 4032 Debrecen, Hungary
3. Institute of Pharmacognosy, University of Szeged, Eötvös u. 6, 6720 Szeged, Hungary
4. Institute of Pharmacodynamics and Biopharmacy, University of Szeged, Eötvös u. 6, 6720 Szeged, Hungary
5. Department of Pharmaceutical Chemistry, University of Debrecen, Egyetem tér 1, 4032 Debrecen, Hungary
6. Department of Pathology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
7. Institute for Ethnobiology, Playa Diana, San José GT-170, Guatemala
8. ELKH-USZ Biologically Active Natural Products Research Group, University of Szeged, Eötvös u. 6, 6720 Szeged, Hungary